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Bug
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Resolution: Unresolved
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Minor
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None
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2.2.18.Final
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None
Occasionally we see the following exception in our application log:
2022-09-02 05:10:44,762 [XNIO-1 I/O-12] ERROR org.xnio.listener - XNIO001007: A channel event listener threw an exception java.lang.IllegalStateException: UT000091: Buffer has already been freed at io.undertow.util.ReferenceCountedPooled.getBuffer(ReferenceCountedPooled.java:104) at io.undertow.server.protocol.framed.AbstractFramedChannel.receive(AbstractFramedChannel.java:398) at io.undertow.websockets.core.AbstractReceiveListener.handleEvent(AbstractReceiveListener.java:38) at app.core.proxy$io.undertow.websockets.core.AbstractReceiveListener$ff19274a.handleEvent(Unknown Source) at io.undertow.websockets.core.AbstractReceiveListener.handleEvent(AbstractReceiveListener.java:33) at app.core.proxy$io.undertow.websockets.core.AbstractReceiveListener$ff19274a.handleEvent(Unknown Source) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:959) at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener.handleEvent(AbstractFramedChannel.java:939) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameReadListener$1.run(AbstractFramedChannel.java:971) at io.undertow.server.protocol.framed.AbstractFramedChannel$1.run(AbstractFramedChannel.java:144) at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612) at org.xnio.nio.WorkerThread.run(WorkerThread.java:479)
Surrounding lines suggest the exception is caused by clients closing WebSocket connections, but I can't be certain of that.
